Suggestions Needed! Pre-wedding songs

I have a friend who is making a mixed CD for his sister as she gets ready for her wedding. He's thought of plenty of country songs, mellow songs, but wants some suggestions for some fun pop songs. Any ideas?

How about some songs from Grease? "You're the One that I Want" would be fun.

For our wedding party song, we used "We Go Together" (the song that all of the students sing at the end of Grease). We didn't want a slow song, because not all of our wedding party people had dates/spouses. That was a FUN song!!